Locking mechanism for firearms.



T. C. JOHNSON.

LOCKING MECHANISM FOR FIREARMS.

APPLICATION FILED JAN. I0. I919.

Patented Apr. 1, 1919.-

rrn STATES PATENT onnron.

THOMAS C. JOHNSON, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO WINCHESTER,REPEATING ARMS CO., 0]? NEW HAVEN, CONNECTICUT, A CORPORATION.

LOCKING MECHANISM ron rmnnnivrs;

, PatentedApnl, 1919.

Application filed January 10, 1919. Serial No. 270,496.

the characters of reference marked thereon,

to be a full, clear, and exact description of the same, and which saiddrawings constitute part of this application, and represent, 1n- IFigure 1 a detail broken view, partly in side elevation and partly incentral long 1-. tudinal section, of a firearm constructed in accordancewith my invention.

Fig. 2 a detached plan view of the lock ing-bolt with the hub of thelocking boltlever in transverse section in the locked position of thelocking-bolt.

Fig. 3 a corresponding view showing the unlocked position of thelocking-bolt.

Fig. 4 a detached plan view of the locking-bolt with the hub of thelocking boltlever in transverse section on the line 4-4: of Fig. 8,showing the stop-cam in its operated position.

Fig. 5 a detached side view of the looking bolt.

Fig. 6 a detached sectional view of the locking bolt-lever in verticallongitudinal section.

Fig. 7 a reverse plan view thereof.

Fig. 8 a front view thereof.

My invention relates to an improvement in locking-mechanism forfirearms, the object being to simplify and cheapen the constructionthereof.

With these ends in view, my invention consists in a locking-mechanismfor lirearms, having certain details of construction as will behereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, it is applied to asingle-shot breechloading firearm in which a barrel 2 hung upon a pivot3 is provided at its rear end with a beveled locking-lug 4: engaged bythe beveled forward end of a locking bolt 5 having an upwardly curvedand rearwardly ex tending arm 6 formed with a longitudinal slot 7 theinner faces of the walls of which are cut away at opposite points toform curved assembling-grooves 8. i The upper face ofthe arm 6 is formednear its rear end with a shallow transverse groove 9 the rear wall ofwhich forms a transverse operatingshoulder 10. The said locking-bolt 5is operated by a one pieoe locking bolt-lever comprising afinger-piece11, an integral bearing-hub 12 depending from the forward end thereof, acombined guide and stop-cam 13,

and a disk-like supporting and retaining collar 14. .A deep transversecut 15 located between the hub 12 and the combined guide and stop cam 13results in the production of I a transverse shoulder. 16- the left handcorner 16 of which co-acts with the shoulder 10at the rear end of thegroove 9 'in the arm 6,.for the retraction of the locking-bolt 5. Thecombined guide and stop-cam 13 is inclined with reference to thelongitudinal axis of the lever, as shown in Fig. 7, an away from thesaid left hand corner 16 of the shoulder 16. The member 13 is adapted insize to fit within the slot 7 of the arm 6 which it assists in guidingas the same moves back and forth. It will be understood that all of theabove described features of the locking bolt-lever are made in onepiece.

The hub 12 of the lockin bolt-lever has bearing in a hole 17 forme forits reception in the receiver 18 of the arm. The rounded rear end of thearm 6 of the locking bolt is formed with a conical recess 19 for thereception of the conical nose 20 of a pin 21 encircled by a helicalspring 22, and having its rear end entered into a hole 23 in the rearend of the receiver 18. The constant effort of the spring 22 is to forcethe locking bolt forward into its locking position.

In assembling my improved locking-mechanism, the locking-bolt is slidrearward until its assembling grooves 8 are brought into registrationwith the bearing-hole 17, whereby the collar 14 of the lever is allowedto pass downward through the slot 7 of the arm 6. The locking bolt isnow slid forward until the shoulder 16 of the lever bears against theshoulder 10 of the arm 6. The edges of the collar 14 will now supportthe rear end of the locking bolt which also retains the lookingbolt-lever in place, this being the locked position of the locking-boltat which time the finger-piece 11 is in line with the longitudinal axisof the arm. The locking-bolt is normally maintained in its lockedposition by the forward pressure of the spring 22.

Tounlock the locking-bolt for openingv or ment ofthe part 13 of thelocking bolt-lever 25 brea king;down,- ,the gnn-,---the fingerpi eqe,withi the righthand wall-of the elot-j of-vthelocking-156N113'retrfibted egdihttheteiisidn relaim I i of the spring'22 by the pressure ofr theztleft 1 lniia locking meehanism forfirearms, the hand end 16 of'the shoulder lfi of the'lockcombinationwith a, locking bolt provided 30 ingsbo lt-l ev r against therlefthandendof with a rearwardly extending arm, 0f a epr i n the Shoulder10111: "the arm 6 of the lockingexerting a constant efiort throughthesaid bolt,the movement'of the-"-1i$'kifig ?hfiflfi.-1e'7ern'16e'th?-"166king-bo1t forward, and from left to. right being limitedby the e a one-piece loo-kin bolt-lever eomprising a,v

